CN105327748A - Ore grinding medium capable of relieving excessive ore grinding - Google Patents
Ore grinding medium capable of relieving excessive ore grinding Download PDFInfo
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- CN105327748A CN105327748A CN201510799370.0A CN201510799370A CN105327748A CN 105327748 A CN105327748 A CN 105327748A CN 201510799370 A CN201510799370 A CN 201510799370A CN 105327748 A CN105327748 A CN 105327748A
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- Prior art keywords
- ore
- ore grinding
- medium
- milling medium
- grinding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/20—Disintegrating members
Abstract
The invention relates to an ore grinding medium capable of relieving excessive ore grinding; the surface of a cylinder with a bottom surface circle radius of R and a height of h (h is not smaller than R and not bigger than 2R) is cut off three sections of identical parts at intervals in the axis direction to obtain a solid shape; the section plane of the cut surface is a rectangle with a length a and a width of b; a value of a is equal to the height h of the cylinder; and a value of b is bigger than 0 and not bigger than R. The ore grinding medium has better rotating performance of a cylindrical medium in the ore grinding process, adopts the line contact crushing, and is strong in crushing force; the cut plane of the surface of the medium adopts the surface contact crushing in the ore grinding process to relieve excessive ore grinding; and the surface has both line contact crushing and surface contact crushing. As a curved surface of the surface of the medium has the stress concentration, the ore grinding medium is obvious in coarse ore crushing effect in the ore grinding process; and the plane of the medium surface can selectively grind coarse ores to protect fine ores so as to achieve the purposes of relieving excessive ore grinding and improving the ore grinding product quality.
Description
Technical field
The present invention relates to a kind of novel milling medium, belong to milling medium field.
Background technology
Grind grading is last one operation that selected front mineral aggregate prepares, and is the operation of the most important thing before ore dressing.Grinding operation exists that long flow path, investment are large, power consumption and the higher feature of material consumption, and material consumption is mainly the consumption of milling medium, the expense of milling medium is made to account for the proportion of whole ore grinding cost very large, it must cause larger impact to the cost of ore dressing, and Grinding producation quality directly affects the index of sorting operation below.Therefore, grinding efficiency be improved and reduce ore grinding cost, just must carry out conscientious research to the main body-milling medium grinding behavior.
Milling medium is energy carrier in ore grinding and force body, and it is made a significant impact the production capacity of grinding machine, grinding efficiency and product particle size by the change of the aspects such as milling medium gross energy, the energy of single milling medium and the specific area of milling medium in grinding machine.The size, shape, proportioning, pack completeness etc. of Grinding Media System and medium itself, be affect grinding process the most directly and be easy to most regulate change factor.The shape of milling medium is one of key character of medium, and at present, common milling medium shape mainly contains following several.
(1) steel section.This type of medium belongs to cylinder shape medium, and shape is the mutation of clavate and spherical medium, has the advantage that spherical medium transmission performance is good and surface area is large, has again rod-shaped dielectric linear contact lay can alleviate the advantage pulverized.But homogenous quantities medium crushing force is less than spherical, the effective milling area of same volume medium is also little than spherical.Belong to short-term contact, alleviated and pulverize not as good as clavate.Pluses and minuses, between ball and rod, are both comprehensive, are applicable to fine grinding.
(2) prismatic medium.Prismatic medium only has axial rotating property good, and other direction can not be rotated, and the media table area of prismatic unit volume is smaller, needs large milling area during fine grinding, therefore prismatic medium is not suitable for fine grinding.But the prismatic line face that is broken for contact, product granularity is even, crosses crushing phenomenon few.
Steel section belongs to cylinder shape medium, and because of it, to have rotating property good, and linear contact lay fragmentation can alleviate the fine grinding that the characteristic pulverized has been widely used in ore.Although and prismatic medium its be broken for the contact of line face, product granularity is even, crosses crushing phenomenon few, and its rotating property is poor, and therefore it apply in ore dressing as milling medium and seldom.
Summary of the invention
The object of the invention is to provide a kind of ore that alleviates overground and improve the milling medium of Grinding producation quality.It, while the effect of performance cylinder shape medium selective crushing, can overcome prismatic medium as milling medium rotating property difference and to the hypodynamic defect of coarse fraction ore reduction.
The present invention is achieved through the following technical solutions: a kind ofly alleviate the overground milling medium of ore, it is characterized in that bottom surface radius of circle be R, the high periphery for h (R≤h≤2R) to excise the physical form of three sections of identical part gained along direction of axis line interval.
The described cylinder bottom surface radius of a circle alleviating the overground milling medium of ore is R, and the sectional plane of cutting rear surface is long is a, the wide rectangle for b, and the value of a equals the axial length of cylinder, and the value of b is 0 < b≤R.
Describedly alleviate the overground existing curved surface in milling medium surface of ore, also have the plane because cutting produces, therefore in ore grinding, both can embody the large advantage of cylinder shape medium crushing force, also can embody that face contact is broken can alleviate the ore grinding advantage that ore crosses pulverizing.
The cutting planes on described a kind of milling medium surface is three, to ensure that whole milling medium has good rotating property.
Milling medium of the present invention combines the advantage of cylinder shape medium and prismatic medium, in grinding process, it not only has the good rotating property of cylinder shape medium, linear contact lay is broken, crushing force is large, and the cutting planes on surface is that the contact of line face can alleviate pulverizing, namely its surface both Line Contacts fragmentations, also have face contact broken.Therefore; this milling medium is in grinding process; curved surface due to surface has stress to concentrate; to coarse fraction ore reduction successful; and the plane of dielectric surface optionally grinds coarse grain ore; protection fine fraction ore, thus reach the object alleviating the overground of ore and improve Grinding producation quality.
Accompanying drawing explanation
Structural representation when Fig. 1 is sectional plane of the present invention wide value b=R, wherein R is cylinder bottom surface radius of a circle.
Front view when Fig. 2 is sectional plane of the present invention wide value b=R.
Top view when Fig. 3 is Fig. 2 sectional plane of the present invention wide value b=R.
Left view when Fig. 4 is Fig. 2 sectional plane of the present invention wide value b=R.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further analyzed, but does not limit and embodiment.
The present invention is a kind of alleviates the overground milling medium of ore, its bottom surface radius of circle be R, the high periphery for h (R≤h≤2R) to excise the physical form of three sections of identical part gained along direction of axis line interval.
Described cylinder bottom surface radius of circle is R, and the sectional plane of cutting rear surface is long is a, the wide rectangle for b, and the value of a equals the axial length of cylinder, and the value of b is 0 < b≤R.
In phosphate rock floating,-0.074mm ~+0.025mm grade is for easily to select grade, Phosphate minerals in this size fraction ranges realizes good monomer dissociation, and-0.025mm grade because of mineral granularity less, the factors such as specific area is large cause the more difficult recovery of this part grade Phosphate minerals, be easy to be lost in mine tailing, therefore think that phosphorus ore ore grinding to-0.025mm grade has existed to a certain degree overground.So, in order to obtain good mineral processing index ,-0.025mm grain size content in ore milling product should be controlled as far as possible.
Embodiment 1
Experimental condition: testing ore used is a kind of high-magnesium-phosphorus ore raw ore, through being crushed to-1mm.Testing grinding machine used is
type grinding machine, filling rate 40%, the addition of three kinds of milling mediums is 14Kg, and ore grinding pulp density is 65%, each 1Kg of ore grinding amount, 11 minutes ore grinding time.Screen analysis adopts the sieve of 0.074mm, 0.025mm.Specification and the concrete result of the test of three kinds of milling mediums are as follows:
Novel milling medium: specification (bottom surface circular diameter × cylinder is high) 30mm × 35mm, b=15mm;
Six prisms: specification (the bottom surface length of side × cylinder is high) 15mm × 35mm;
Steel section: specification (bottom surface circular diameter × cylinder is high) 30mm × 35mm.
Table 1 three kinds of milling mediums are to the grinding efficiency contrast test/% of high-magnesium-phosphorus ore raw ore
As can be seen from table 1 result of the test, milling medium of the present invention has certain advantage to the grinding efficiency of high-magnesium-phosphorus ore raw ore compared with other two kinds of milling mediums.Under identical ore grinding experimental condition, advantage grade-0.074mm+0.025mm the content being conducive to most ore dressing in the ore milling product of novel milling medium is the highest in three groups of tests, be 30.72%, comparatively steel section and six prisms are with grain size content difference high 2.02% and 3.56%.Meanwhile ,-0.025mm grain size content is minimum in three groups of tests, is 34.25%, and comparatively steel section and six prisms are with grain size content respectively low 2.91% and 2.04%.And+0.074mm grain size content is between steel section and six prisms.Therefore, the novel milling medium of this experiment results proved has the effect alleviating the overground of ore and improve Grinding producation quality, reaches expectation index of the present invention.
Embodiment 2
Experimental condition: testing ore used is the sand setting that high-magnesium-phosphorus ore takes from cyclone.Testing grinding machine used is
type grinding machine, filling rate 40%, the addition of three kinds of milling mediums is 14Kg, and ore grinding pulp density is 65%, each 1Kg of ore grinding amount, 11 minutes time.Screen analysis adopts the sieve of 0.074mm, 0.025mm.Specification and the concrete result of the test of three kinds of milling mediums are as follows:
Novel milling medium: specification (bottom surface circular diameter × cylinder is high) 30mm × 35mm, b=15mm;
Six prisms: specification (the bottom surface length of side × cylinder is high) 15mm × 35mm;
Steel section: specification (bottom surface circular diameter × cylinder is high) 30mm × 35mm.
Table 2 three kinds of milling mediums are to the grinding efficiency contrast test/% of high-magnesium-phosphorus ore hydrocyclone sand
As can be seen from table 2 result of the test, the grinding efficiency of milling medium of the present invention to high-magnesium-phosphorus ore hydrocyclone sand is better than other two kinds of milling mediums.Under identical ore grinding experimental condition, advantage grade-0.074mm+0.025mm the content being conducive to most ore dressing in the ore milling product of novel milling medium is the highest in three groups of ore grinding tests, be 28.11%, respectively than steel section and six prisms with grain size content high 2.96% and 3.98%.Meanwhile ,-0.025mm grain size content is minimum in the test of three groups of ore grindings, is 21.46%, respectively than steel section and six prisms with grain size content low 4.35% and 3.26%.And+0.074mm grain size content is between steel section and six prisms.Therefore, the novel milling medium of this experiment results proved has the effect alleviating the overground of ore and improve Grinding producation quality, reaches expectation index of the present invention.
Claims (4)
1. can alleviate the overground milling medium of ore, it is characterized in that bottom surface radius of circle be R, the high periphery for h (R≤h≤2R) to excise the physical form of three sections of identical part gained along direction of axis line interval.
2. according to claim 1ly a kind ofly alleviate the overground milling medium of ore, it is characterized in that cylinder bottom surface radius of a circle is R, the sectional plane of cutting rear surface is long is a, the wide rectangle for b, and the value of a equals the axial length of cylinder, and the value of b is 0 < b≤R.
3. according to claim 1ly a kind ofly alleviate the overground milling medium of ore, it is characterized in that its surperficial existing curved surface, also the plane because cutting produces is had, therefore in ore grinding, both can embody the large advantage of cylinder shape medium crushing force, and also can embody face contact fragmentation and can alleviate the ore grinding advantage that ore crosses pulverizing.
4. a kind of milling medium belonging to claim 1, is characterized in that the cutting planes on surface is three, to ensure that whole milling medium has good rotating property.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510799370.0A CN105327748A (en) | 2015-11-19 | 2015-11-19 | Ore grinding medium capable of relieving excessive ore grinding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510799370.0A CN105327748A (en) | 2015-11-19 | 2015-11-19 | Ore grinding medium capable of relieving excessive ore grinding |
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| CN105327748A true CN105327748A (en) | 2016-02-17 |
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| CN201510799370.0A Pending CN105327748A (en) | 2015-11-19 | 2015-11-19 | Ore grinding medium capable of relieving excessive ore grinding |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB274786A (en) * | 1927-05-26 | 1927-07-28 | Otto Kordt | Improvements in grinding bodies for ball-, drum-, and tubular mills |
| JPS5479866A (en) * | 1977-12-07 | 1979-06-26 | Kawasaki Heavy Ind Ltd | Crushing media used for mills |
| CN2227524Y (en) * | 1995-02-08 | 1996-05-22 | 黄显源 | Ore grinding medium |
| CN2260660Y (en) * | 1995-12-02 | 1997-08-27 | 黄显源 | Improved ore grinding medium |
| CN2498157Y (en) * | 2001-08-11 | 2002-07-03 | 安徽省宁国市耐磨材料总厂 | Capsule ball grinding media |
| CN2635211Y (en) * | 2003-07-13 | 2004-08-25 | 安徽省宁国市耐磨材料总厂 | Bullet head shaped grinding medium |
| CN201342361Y (en) * | 2008-09-19 | 2009-11-11 | 许永伟 | Cast-steel obtuse regular hexahedron grinding media of fine grinding ball mill |
| CN202290207U (en) * | 2011-10-25 | 2012-07-04 | 山东盛大矿业股份有限公司 | Ore grinding medium of two-section ball mill |
| CN202823523U (en) * | 2009-02-19 | 2013-03-27 | 阿萨瑞尔-曼德特公司 | Grinding medium |
-
2015
- 2015-11-19 CN CN201510799370.0A patent/CN105327748A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB274786A (en) * | 1927-05-26 | 1927-07-28 | Otto Kordt | Improvements in grinding bodies for ball-, drum-, and tubular mills |
| JPS5479866A (en) * | 1977-12-07 | 1979-06-26 | Kawasaki Heavy Ind Ltd | Crushing media used for mills |
| CN2227524Y (en) * | 1995-02-08 | 1996-05-22 | 黄显源 | Ore grinding medium |
| CN2260660Y (en) * | 1995-12-02 | 1997-08-27 | 黄显源 | Improved ore grinding medium |
| CN2498157Y (en) * | 2001-08-11 | 2002-07-03 | 安徽省宁国市耐磨材料总厂 | Capsule ball grinding media |
| CN2635211Y (en) * | 2003-07-13 | 2004-08-25 | 安徽省宁国市耐磨材料总厂 | Bullet head shaped grinding medium |
| CN201342361Y (en) * | 2008-09-19 | 2009-11-11 | 许永伟 | Cast-steel obtuse regular hexahedron grinding media of fine grinding ball mill |
| CN202823523U (en) * | 2009-02-19 | 2013-03-27 | 阿萨瑞尔-曼德特公司 | Grinding medium |
| CN202290207U (en) * | 2011-10-25 | 2012-07-04 | 山东盛大矿业股份有限公司 | Ore grinding medium of two-section ball mill |
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Application publication date: 20160217 |
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